// Add-on · £10 per month + VAT

Approved invoices, straight into your books.
No exporting. No re-keying.

Accountancy Integration connects DuoApp to your accounting package. When a subcontractor invoice is approved in DuoApp, it goes across as a supplier bill - with the subcontractor as the supplier, the VAT treatment, and CIS and retention on their own lines so the total matches what you owe. When the bill is paid, DuoApp marks the invoice Paid.

£10
Per month + VAT
Approved
Only approved invoices go
Once
Never sent twice
Paid
Status syncs back
Xero is available now. QuickBooks Online and Sage Business Cloud Accounting are coming soon. You connect one accounting package at a time.
// How it works

Connect once. Then approve as normal.

01

Connect

An admin chooses the accounting package and signs in on the provider's own website. DuoApp never sees the password.

02

Approve

Approve subcontractor invoices in DuoApp as you do today. Send each one automatically on approval, or send them one at a time.

03

Bill appears

The invoice arrives in your accounting package as a supplier bill - amounts, VAT, CIS deductions and retention included.

04

Paid syncs back

When the bill is paid in your accounting package, DuoApp marks the invoice Paid automatically. You can switch this off.

// What goes across

A bill that matches what you actually owe.

  • The subcontractor as the supplier. Existing suppliers are matched by name, so you don't end up with duplicates.
  • Amounts and VAT. 20%, 0% and the domestic reverse charge.
  • CIS and retention on separate lines. The bill total matches the amount you owe the subcontractor.
  • Split invoices. An invoice split between people becomes one bill per person.
  • Only approved invoices, never duplicated. Nothing goes across until it's approved, and the same invoice isn't sent twice.
  • Your DuoApp subscription invoices too. Send them across as a bill from DuoApp Limited, so there's nothing to key in.
Bill · Jenkins PlasteringFrom DuoApp invoice INV-2026-0142Draft · Xero
Plastering worksVAT: domestic reverse charge£10,000.00
Retention5%−£500.00
CIS deduction20%−£1,900.00
Bill total£7,600.00
Invoice PDF attached

Illustrative example of a bill in Xero.

// By accounting package

What to expect in each package.

The flow is the same everywhere: approved in DuoApp, bill in your books, Paid back in DuoApp. What the bill looks like when it lands depends on the package.

Xero
Available now

Xero

  • Bills arrive as drafts, so your bookkeeper can review them before approving
  • The invoice PDF is attached to the bill
  • VAT, reverse charge, CIS and retention are mapped using your organisation's tax rates and chart of accounts - CIS and retention go to liability accounts if you have them
  • Existing suppliers are matched by name, and their bank details are never overwritten
  • Payments show in DuoApp, usually within minutes
QuickBooks Online
Coming soon

QuickBooks Online

  • Invoices arrive as bills - QuickBooks Online has no draft stage for bills
  • Amounts, VAT, CIS and retention carried across
  • Paid bills marked Paid in DuoApp
  • The invoice PDF is not attached
Sage Business Cloud Accounting
Coming soon

Sage Business Cloud Accounting

  • Invoices arrive as purchase invoices
  • Amounts, VAT, CIS and retention carried across
  • Paid purchase invoices marked Paid in DuoApp
  • The invoice PDF is not attached
// Security & control

Your admins stay in charge.

Sign in on the provider's site

You connect through the accounting provider's own secure sign-in. DuoApp never sees or stores your accounting password.

Admins only

Only admins can change the settings. Read-only admins can view them. Everyone else doesn't see the integration at all.

Disconnect any time

Disconnect your accounting package whenever you like, and choose whether invoices send automatically or one at a time.

// Pricing

One simple add-on price.

£10
per month
// + VAT · GBP
  • Added as a separate line on your monthly DuoApp invoice and collected with it by Direct Debit.
  • Charged for each calendar month the add-on is switched on - whole months, not pro-rata.
  • Not charged during your free trial.
  • Switch it off whenever you like - there's no charge for the months after that.

In addition to your usual per-user price. See pricing and our terms.

// Questions

Accountancy Integration, explained.

How much does Accountancy Integration cost?
£10 per month plus VAT, on top of your usual DuoApp subscription. It's added as a separate line on your monthly DuoApp invoice and collected with it by Direct Debit. You're charged for each calendar month the add-on is switched on - whole months, not pro-rata - and it isn't charged during your free trial.
Which accounting packages does it work with?
Xero is available now. QuickBooks Online and Sage Business Cloud Accounting are coming soon. You connect one accounting package at a time.
Which invoices are sent to my accounting package?
Only approved subcontractor invoices. You can send them automatically when they're approved, or send them one at a time. The same invoice is never sent twice. You can also send your DuoApp subscription invoices across as a bill from DuoApp Limited.
How are VAT, CIS and retention handled?
The bill includes the VAT treatment (20%, 0% or domestic reverse charge), and CIS deductions and retention go on separate lines so the bill total matches what you owe the subcontractor. In Xero these are mapped using your organisation's tax rates and chart of accounts, with CIS and retention posted to liability accounts if you have them. Your bookkeeper or accountant should still review bills before they're approved or paid.
Will bills be posted without anyone checking them?
In Xero, bills arrive as drafts with the invoice PDF attached, so your bookkeeper can review them first. QuickBooks Online has no draft stage for bills, and Sage Business Cloud Accounting receives them as purchase invoices; neither has the PDF attached.
What happens when a bill is paid?
When the bill is paid in your accounting package, DuoApp marks the invoice as Paid automatically. With Xero, payments usually show in DuoApp within minutes. You can switch this off if you'd rather mark invoices paid yourself.
Does it create duplicate suppliers or change bank details?
In Xero, existing suppliers are matched by name, so an existing supplier is used rather than a new one being created. Bank details on existing suppliers are never overwritten.
What happens with split invoices?
An invoice that's split between people becomes one bill per person, so each supplier gets their own bill.
Who can set it up, and is it secure?
Only admins can change the settings; read-only admins can view them, and other roles don't see the integration. You connect by signing in on the accounting provider's own website, so DuoApp never sees your password. You can disconnect at any time.
How do I stop paying for it?
Switch the add-on off. You won't be charged for any calendar month after the one in which you switch it off.

Stop typing approved invoices into your books.

See Accountancy Integration in a 30-minute demo, or start a free trial - the add-on isn't charged while you're trialling.

Book a demo →Sign up free